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Dimple neodymium drain plug

dlong

New member
As much trouble as I've had with wethead cams, and never finding any metalic debris on the OEM drain plug, I ordered the Dimple. The magnet is very strong. It's marked 20x1.5x12 and specific for the "water head" on the package insert. I can't get it to fit. The first thread barely engages and will turn no further by hand. The original plug looks fine and seats easily. I can't see an obvious difference in thread pitch between the two. Anyone have experience with the Dimple product? Any idea of the spec for the stock plug beyond the 20x1.5 listed on the MaxBMW fiche? I'm waiting to hear back from Dimple.
 
Do you have a digital caliper, someway to measure across the threads on each plug? That will give you the outside diameter. You might also lay one set of threads onto the other...just confirm you have the exact same pitch of threads. It will be pretty obvious if they are different or not.
 
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